Labrundinia nathani Silva

Silva, Fabio Laurindo Da, Fonseca-Gessner, Alaide Aparecida & Ekrem, Torbjørn, 2014, A taxonomic revision of genus Labrundinia Fittkau, 1962 (Diptera: Chironomidae: Tanypodinae), Zootaxa 3769 (1), pp. 1-185 : 86-87

publication ID	https://doi.org/ 10.11646/zootaxa.3769.1.1
publication LSID	lsid:zoobank.org:pub:705567C6-C912-4A19-9DE2-726254E17076
DOI	https://doi.org/10.5281/zenodo.5621065
persistent identifier	https://treatment.plazi.org/id/676987A8-B757-FF87-FF29-F9ABFD21F84D
treatment provided by	Plazi
scientific name	Labrundinia nathani Silva
status	sp. nov.

Treatment

Labrundinia nathani Silva View in CoL sp. n.

( Fig. 41 View FIGURES 41 A – M )

Material examined. Type material: Holotype male, Brazil: São Paulo, São Carlos, Monjolinho stream, associated with aquatic macrophyte, Myriophyllum aquaticum , 12.iii.2008, F. L. Silva ( MZUSP). Paratype: 1 male same data as holotype ( NTNU).

Etymology. Named in honour of Nathan Gilbert Viets from Indianapolis, in recognition for his friendship, kindness and continuous support.

Diagnostic characters. Labrundinia nathani sp. n. differs from other Labrundinia species by the combination of the following characters. Adult male: abdominal tergites II, V with faint transverse band near proximal margin, T III–IV, VI with continuous transverse band near proximal margin, T VII–VIII almost completely brown; hypopygium pale brown, sternapodeme with distinct anterior process.

Description. Adult male (n = 2 unless otherwise stated)

Size. Total length 2.3–2.5 mm. Wing length 1.4 mm. Total length/wing length 1.61–1.74. Wing length/ profemur length 2.69–2.73.

Coloration. Head pale brown with dark brown occipital margin; pedicel and antenna brown; maxillary palp pale brown. Thorax brown with dark scutum; antepronotum pale brown. Wing membrane transparent without any marking. Legs pale brown. Tibia I brown, Ti II–III apically brown. Abdominal tergites II, V with faint transverse band near proximal margin, T III–IV, VI with continuous transverse band near proximal margin, VII–VIII almost completely brown; hypopygium pale brown ( Fig. 41L View FIGURES 41 A – M ).

Head ( Figs 41A–E View FIGURES 41 A – M ). Temporal setae 12–18, uniserial ( Fig. 41B View FIGURES 41 A – M ). Eye ratio 0.83–0.85. Tentorium ( Fig. 41C View FIGURES 41 A – M ) 161–1.69 Μm long. Clypeus 90–101 Μm long, 63–76 Μm wide at largest part, bearing 18–19 setae. Cibarial pump 200–213 Μm long ( Fig. 41D View FIGURES 41 A – M ), with anterior margin concave. Lengths of palpomeres 1–5 (in Μm): 37–40; 57–59; 129–138; 138–154; 138–150. Antennal flagellum 824–835 Μm long, diameter of pedicel 153–159 Μm, apical setae single ( Fig. 41E View FIGURES 41 A – M ), AR 1.13–1.34.

Thorax. Antepronotum with 3 lateral setae. Acrostichals 48–54, biserial, diverging evenly posteriorly, starting close to antepronotum and almost reaching scutellum; dorsocentrals 30, irregularly biserial; prealars 9–11; supraalars 3. Anapleural suture ratio 0.39–0.46. Scutellum with transverse row of 8 setae and group of numerous fine anterior setae.

Wing ( Fig. 41F View FIGURES 41 A – M ). Width 0.4 (1) mm. Costa 1.2–1.3 mm long. R2+3 absent. VR 0.78–0.81. WW 0.29 (1). Brachiolum with 2 setae. Squama setiferous.

Legs ( Figs 41G–K View FIGURES 41 A – M ). Fore leg: width at apex of tibia 42–45 Μm ( Fig. 41G View FIGURES 41 A – M ), tibia with single, apical and pectinate spur 19–22 Μm long ( Fig. 41H View FIGURES 41 A – M ), with three lateral teeth and two preapical setae; ta1-4 without any preapical

pseudospurs. Mid leg: width at apex of tibia 42–49 Μm long ( Fig. 41I View FIGURES 41 A – M ), tibia with single, apical and pectinate spur 25–32 Μm long with three lateral teeth ( Fig. 41J View FIGURES 41 A – M ) and two preapical setae; ta1-4 each with two preapical pseudospurs. Hind leg: width at apex of tibia 43–46 Μm long ( Fig. 41K View FIGURES 41 A – M ), tibia without spur; comb with 6 bristles; ta1-4 without any preapical pseudospurs. Claws slender, hooked; pulvilli absent. Lengths and proportion of leg segments as in Table 26.

fe ti ta1 ta2 ta3

p1 518–534 521–537 298 267 155 p2 689–710 646 317 189 146 p3 587–607 612–629 670 299 208

ta4 ta5 LR BV SV p1 118 75 0.55 2.20 3.54 p2 146 93 1.23 2.52 1.91 p3 141 93 1.06 2.57 1.85 Hypopygium ( Fig. 41M View FIGURES 41 A – M ). Tergite IX arched, with 10–12 posterior setae. Membranous anal point rounded. Phallapodeme 61–73 Μm long. Sternapodeme with distinct anterior process. Gonocoxite cylindrical, 137–150 Μm long, 65–66 Μm wide, with slightly concave inner margin. GcR 2.07–2.30. Gonostylus simple and slender, 100– 108 Μm long; megaseta 19–22 Μm long. HR 1.37–1.39. HV 2.12–2.51.

Adult female, pupa and larva. Unknown.

Remarks. Adult males of Labrundinia nathani may be distinguished from those of the related species L. nicaraguensis and L. panamensis by the faint transverse band near proximal margin of abdominal tergites II and V. Labrundinia nathani has been recorded only from its type locality in São Paulo State, Brazil. The adults emerged from the aquatic macrophyte Myriophyllum aquaticum placed in a plastic tray and kept in laboratory. This is a likely habitat for the unknown immature stages.